How many protons, neutrons, and electrons are in Lithium

Waves on a swimming pool propagate at 0.423 m/s. You splash the water at one end of the pool and observe the wave go to the opposite end, reflect, and return in 37.7 s. How far away is the other end

An electron is ejected at a speed of 1.7*10^6 m/s from the electron gun of a computer monitor. If the viewing screen is 32 cm from the end of the gun, how far will the electron travel in the vertical direction before hitting the screen?

Time measurements from a stopwatch are not precise. Why not?

Explain how we use work and energy to complete everyday tasks.

Why does the magnet rotate in an AC motor?

Sketch of the distance vs time graph for a car with constant velocity

3. Applying Concepts Explain why a canoe that has hollow, water- tight compartments on its ends won't sink, even if it is capsized.

If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot. A) true B) false C) unable to decide without knowing the shape of the object

Standard voltage for electrical circuits in the United States is 120 volts. Is this the standard voltage in other countries?

An astronaut on the planet Trappist-1b tosses a rock horizontally with a speed of 7.95m/s. The rock falls through a vertical distance of 2.35m and lands horizontal distance of 9.57m from the astronaut.